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<h1>lua-cassandra</h1>

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<h2>Examples</h2>
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  <li><strong>ssl.lua</strong></li>
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<h2>Modules</h2>
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    <h2>ssl.lua</h2>
<pre>
<span class="comment">------------------------------------------
</span><span class="comment">-- Single host module with SSL connections
</span><span class="comment">-- Required modules: LuaSocket, LuaSec
</span><span class="comment">------------------------------------------
</span>
<span class="keyword">local</span> cassandra = <span class="global">require</span> <span class="string">"cassandra"</span>

<span class="keyword">local</span> client = <span class="global">assert</span>(cassandra.new {
  ssl = <span class="keyword">true</span>,
  verify = <span class="keyword">true</span>, <span class="comment">-- optionally, verify the server certificate
</span>  cafile = <span class="string">"/path/to/node-certificate.pem"</span> <span class="comment">-- optionally, the CA in PEM format
</span>})

<span class="global">assert</span>(client:connect())

<span class="comment">--------------------------------------
</span><span class="comment">-- Cluster module with SSL connections
</span><span class="comment">--------------------------------------
</span>
http {
  lua_shared_dict cassandra <span class="number">1</span>m;

  server {
    ...

    location / {
      # this will be used to verify the server certificate
      lua_ssl_trusted_certificate <span class="string">"/path/to/node-certificate.pem"</span>;

      content_by_lua_block {
        <span class="keyword">local</span> Cluster = <span class="global">require</span> <span class="string">"resty.cassandra.cluster"</span>

        <span class="keyword">local</span> cluster, err = Cluster.new {
          shm = <span class="string">"cassandra"</span>, <span class="comment">-- defined in http block
</span>          contact_points = {<span class="string">"127.0.0.1"</span>, <span class="string">"127.0.0.2"</span>},
          keyspace = <span class="string">"my_keyspace"</span>,
          ssl = <span class="keyword">true</span>,
          ssl_protocol = <span class="string">'any'</span>,
          verify = <span class="keyword">true</span>
        }
        <span class="keyword">if</span> <span class="keyword">not</span> cluster <span class="keyword">then</span>
          ngx.log(ngx.ERR, <span class="string">"could not create cluster: "</span>, err)
          ngx.exit(<span class="number">500</span>)
        <span class="keyword">end</span>

        <span class="keyword">local</span> ok, err = cluster:refresh() <span class="comment">-- automatically called upon first query
</span>        <span class="keyword">if</span> <span class="keyword">not</span> ok <span class="keyword">then</span>
          ngx.log(ngx.ERR, <span class="string">"could not connect to cluster: "</span>, err)
          ngx.exit(<span class="number">500</span>)
        <span class="keyword">end</span>

        ngx.say(<span class="string">"SSL connection: OK"</span>)
      }
    }
  }
}</pre>


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